CN1463506A

CN1463506A - Path search method and path search device, and mobile terminal

Info

Publication number: CN1463506A
Application number: CN02802136A
Authority: CN
Inventors: 铃木邦彦; 陈小元; 周长明
Original assignee: Yozan Inc
Current assignee: Yozan Inc
Priority date: 2001-01-19
Filing date: 2002-01-17
Publication date: 2003-12-24
Also published as: JPWO2002058265A1; EP1353449A4; JP2004289191A; WO2002058265A1; EP1353449A1; US20030133493A1; KR20030069975A; TW546954B

Abstract

By calculating the complex product between each of complex-conjugate patterns for pilot patterns assigned individually to a plurality of transmitting antennas of a base station and a de-spread signal (ISI, ISQ), which has been obtained from a received signal by a de-spreading portion 22, a separating portion 23 separates the pilot block of the de-spread signal, for each of the plurality of transmitting antennas, from the received signal. Subsequently, after a delay-profile for the transmitted signal from each of the plurality of transmitting antennas is created by using the separated signals {(PLI1, PLQ1), (PLI2, PLQ2)}, a delay-profile combining portion 27 combines a delay-profile for multi-path selection, and multi-path selection is performed based on the delay-profile for multi-path selection. Therefore, highly accurate path search is possible in a DS-CDMA system of the transmitter diversity type.

Description

Method for searching path, path-searcher and portable terminal

Technical field

The present invention relates to method for searching path, path-searcher and portable terminal, more particularly, relate to method for searching path and path-searcher that the received signal of launching according to the some antennas from the base station is carried out route searching, and the portable terminal that comprises path-searcher.

Background technology

Recently, use directly expansion code division multiple access (DS-CDMA) scheme, and wherein the extended Wideband Code Division Multiple Access (WCDMA) to 5MHz of spread bandwidth (W-CDMA) scheme attracts much attention in moving communicating field.In DS-CDMA, utilize the signal of extended code expansion to go out, and exist therein under some propagation paths environmental condition of (being called " multipath ") from base station, advance to the mobile radio station such as cellular telephone from the base station.Because the propagation time barrier with building in propagation path or geographical feature by propagation path changes, so the propagation time differs from one another.After passing through multi-path signal, described signal is received by the mobile radio station such as cellular telephone.Under the multipath condition, relaxation phenomenon takes place, wherein because the conflicting mode between the incoming wave changes with moving of mobile radio station, so the signal level generation acute variation at mobile radio station place.

Consider the multichannel decay, mobile radio station detects the reception timing in each path, is called " route searching ".Mobile radio station is according to the result of route searching, and the spreading result of going is to received signal carried out the RAKE-combination, and pin-point accuracy decipher the information that is included in the received signal.

On the other hand, the method for the reception antenna diversity of some antennas is wherein arranged in known utilization at mobile radio station, perhaps wherein in the method for the transmit diversity of the some antennas of arrangement of base stations, improves the receptivity of mobile radio station under the multichannel situation.Compare situation about receiving and the situation that adopts transmit diversity in the base station at mobile radio station employing antenna diversity, when adopting the antenna diversity reception, the circuit structure complexity in the mobile radio station, still when adopting transmit diversity, circuit structure should be uncomplicated.So research at present is positioned at the realization of the emission diversity scheme of base station.

There are two types in transmit diversity: a kind of is predetermined (PD) type that the emission mode from the data of base station is determined in advance; Another kind is the selection information that comes from mobile radio station by utilization, determines feedback (FB) type of emission mode.The PD type transmit diversity of proposing has TSTD (Time Switched Transmit Diversity) method, OTD (Orthogonal Transmit Diversity) method and STTD (Space Time Transmit Diversity) method.These emission diversity methods are disclosed in " the PerformanceEvaluation of Forward Link Transmit Diversity of S.Fukumoto etc., TECHNICALREPORT OF IEICE, RCS99-12 (1999-04), 31-36 page or leaf ".

Even when adopting aforesaid emission diversity method, also must carry out route searching at mobile radio station.But, when adopting the method for transmit diversity, in fact do not have to propose under the situation of not using complicated circuit structure, to carry out the technology of route searching in the base station.

Summary of the invention

Produced the present invention in this case, first purpose of the present invention provides in the DS-CDMA system that adopts emission diversity method, and pin-point accuracy ground carries out the method for searching path and the path-searcher of route searching.

In addition, second purpose of the present invention provides a kind of in the DS-CDMA system that adopts emission diversity method, finishes the route searching of pin-point accuracy and the portable terminal of high quality communication.

According to the present invention, provide a kind of basis to comprise corresponding spread signal by reception, and the some signals that send from some transmitting antennas and the received signal that obtains, carry out the method for searching path of route searching, described some transmitting antennas are given the complex number type pilot frequency mode separately, and described pilot frequency mode is orthogonal, and described method comprises the steps: according to the extended code that produces spread signal, go to received signal expansion, thereby obtain to go spread signal; Go the multiplication of complex numbers between the conjugate complex number pattern of spread signal and each pilot frequency mode by calculating, going spread signal to be divided into some signals, each signal comprises the pilot blocks that corresponds respectively to transmitting antenna; According to the signal that separates, produce the delay abridged table of the some signals that send from transmitting antenna respectively; According to the delay abridged table that produces, be combined into the delay abridged table that is used for the multipath selection; Be used for the delay abridged table that multipath is selected with basis, carry out multipath and select.

In this method for searching path, go spread step to obtain to remove spread signal by execution, wherein go spread signal to comprise pilot blocks, and pilot blocks correspond respectively to transmitting antenna.In separating step, remove spread signal and to give the multiplication of complex numbers between the conjugate complex number pattern of each pilot frequency mode of respective antenna by calculating respectively, separate pilot blocks.Subsequently, produce in the step postponing abridged table,, produce the delay abridged table of the signal that sends from transmitting antenna respectively by utilizing separation signal.In postponing the abridged table combination step,, produce the delay abridged table that is used for the multipath selection by utilizing the delay abridged table that produces.Subsequently, in the process of carrying out multipath selection step, be used for the delay abridged table that multipath is selected, finish multipath and select by utilization.

Therefore, by utilizing method for searching path of the present invention, finish the accurate route searching in the DS-CDMA system that adopts emission diversity method.

In method for searching path of the present invention, (a) or (b) can be used as pilot blocks (will be used in the route searching): (a) comprise the pilot blocks of part dedicated pilot piece at least, described dedicated pilot piece is included in each time slot on the DPCH; (b) comprise the pilot blocks of partial common pilot blocks at least, described common pilot piece is included in each base station in each time slot on the common common pilot channel of using.

In addition, comprise to small part dedicated pilot piece and at least the pattern of partial common pilot blocks can be used as the pilot blocks that will in route searching, use, described dedicated pilot piece is included in each time slot on the DPCH, and described common pilot piece is included in each base station in each time slot on the common common pilot channel of using.

In this case, (a) can produce the delay abridged table that uses the dedicated pilot piece and use the delay abridged table of common pilot piece and (b) parallelly produce delay abridged table that uses the dedicated pilot piece and the delay abridged table that uses the common pilot piece in proper order.

In method for searching path of the present invention, delay abridged table generation step can comprise the steps: the sampled point in being present in some subsequent timeslots, to the amplitude of the in-phase component in each separation signal addition that is concerned with, employing point in being present in some subsequent timeslots, to the amplitude of the quadrature component in each separation signal addition that is concerned with, in some pilot blocks, regularly arrange sampled point with symbol period; Calculate signal power by the result who utilizes relevant addition acquisition; The mean value of signal calculated power; According to the mean value of signal power, produce delay abridged table shape.Multipath selects execution in step to comprise the steps: the sample drawn position, promptly is used for the delay abridged table that multipath is selected, and the mean value of signal power is not less than the phase place of predetermined threshold; And according to the sample position that extracts, calculating path-phase information.

In this case, when the delay abridged table of each signal correspondence that produces respectively and send from transmitting antenna, carry out relevant addition about the amplitude of the in-phase component that is positioned at sampled point, wherein in-phase component is included in each separation signal, sampled point is present in some subsequent timeslots, and carry out relevant addition about the amplitude of the quadrature component that is positioned at sampled point, wherein quadrature component is included in each separation signal.Regularly arrange sampled point according to the symbol period in some pilot blocks.Thereby background noise and interference components are lowered.

Subsequently, in the signal power calculation procedure, calculate signal power by the result who utilizes relevant addition acquisition.Subsequently, postponing abridged table shape generation step,, produce delay abridged table shape by utilizing the calculating mean value of signal power.

According to the delay abridged table of the pin-point accuracy that produces, the synthetic delay abridged table that is used for the multipath selection in combination step, the described delay abridged table that is used for the multipath selection is generally used for handling the signal of antenna emission.Subsequently, select step at multipath, extract the delay abridged table that is used for the multipath selection, the mean value of signal power is not less than the sample position of predetermined threshold, and by utilizing the sample position that extracts to carry out multipath selection, the information of calculating path phase place.Thereby, carry out the route searching of pin-point accuracy.

In method for searching path of the present invention, postpone abridged table and produce the signal power that step can comprise the steps: to calculate each sampled point in the pilot blocks that is present in each separation signal; Regularly arrange sampled point with the symbol period in some pilot blocks; Calculating is present in the mean value of the signal power of the sampled point in some subsequent timeslots; According to the mean value of signal power, produce delay abridged table shape.Multipath selects execution in step to comprise the steps: to extract the delay abridged table that is used for the multipath selection, and the mean value of signal power is not less than the sample position of predetermined threshold; According to the sample position that extracts, calculating path-phase information.

According to a second aspect of the invention, the invention provides a kind of basis and comprise corresponding spread signal by reception, and the some signals that send from some transmitting antennas and the received signal that obtains, carry out the path-searcher of route searching, described some transmitting antennas are given pilot frequency mode separately, and described pilot frequency mode is orthogonal, and described path-searcher comprises: according to the extended code that produces spread signal, go to received signal expansion, thereby obtain to go the expanding unit that goes of spread signal; Go the multiplication of complex numbers of the conjugate complex number pattern of spread signal and each pilot frequency mode by calculating, going spread signal to be divided into the separator of some signals, each signal comprises the pilot blocks that corresponds respectively to transmitting antenna; The signal that utilize to separate produces the delay abridged table generation device of the delay abridged table of the described some signals that send from transmitting antenna respectively; According to the delay abridged table that produces, be combined into the delay abridged table composite set of the delay abridged table that is used for the multipath selection; Be used for the delay abridged table that multipath is selected with basis, carry out the multipath choice device that multipath is selected.

In this path-searcher, separator calculates the multiplication of complex numbers of conjugate complex number pattern remove spread signal and to give each pilot frequency mode of antenna separately.As this result calculated, go the pilot blocks in the spread signal separated by what utilization went that expanding unit obtains.Subsequently, postpone abridged table by utilizing separation signal, generation device produces the delay abridged table of the signal that sends from transmitting antenna.Postpone the abridged table composite set according to the delay abridged table that produces, be combined into the delay abridged table that is used for the multipath selection.Subsequently, the multipath choice device carries out multipath and selects according to being used for the delay abridged table that multipath is selected.

Therefore, path-searcher of the present invention is finished the route searching of pin-point accuracy in the DS-CDMA system that adopts transmit diversity.

In path-searcher of the present invention, postponing the abridged table generation device comprises: the sampled point in being present in some subsequent timeslots, to the amplitude of the in-phase component in each separation signal addition that is concerned with, employing point in being present in some subsequent timeslots, to the be concerned with relevant adder of addition of the amplitude of the quadrature component in each separation signal, in some pilot blocks, regularly arrange sampled point with symbol period; Calculate the signal power calculation element of the result's who obtains by the relevant adder of use signal power; The average computing device of the mean value of signal calculated power; With mean value, produce the delay abridged table shape generation device that postpones abridged table according to signal power.The multipath choice device comprises: extract the delay abridged table that is used for the multipath selection, the mean value of signal power is not less than the draw-out device of the sample position of predetermined threshold; With the sample position according to extraction, the path of calculating path-phase information-phase calculation device.

In path-searcher of the present invention, postpone the abridged table generation device and comprise: calculate the signal power calculation element of the signal power of the sampled point in the pilot blocks that is present in each separation signal, in some pilot blocks, regularly arrange sampled point with symbol period; Calculating is present in the average computing device of mean value of the signal power of the sampling location in some subsequent timeslots; With mean value, produce the delay abridged table shape generation device that postpones abridged table according to signal power.The multipath choice device comprises: extract the delay abridged table that is used for the multipath selection, the mean value of signal power is not less than the draw-out device of the sample position of predetermined threshold; With the sample position according to extraction, the path of calculating path-phase information-phase calculation device.

According to a third aspect of the invention we, provide a kind of portable terminal, comprising: the receiving system that receives the signal that sends from the base station; With the signal that receives based on receiving system according to the present invention, the path-searcher of executive path search.

In this portable terminal, path-searcher carries out route searching exactly according to the signal that receiving system receives.Portable terminal carries out RAKE and receives according to the accurate result of route searching subsequently, thereby improves the quality that received signal is handled.

Description of drawings

Fig. 1 has schematically illustrated the DS-CDMA system that comprises according to the portable terminal of the first embodiment of the present invention;

Fig. 2 has represented the radio frame structure of downlink dedicated physical channels;

Fig. 3 has represented for the STTD scheme in the transmit diversity, from the emission mode of first antenna with from the relation between the emission mode of second antenna;

Fig. 4 has represented to send the radio frame structure of portable terminal to from the base station by common pilot channel;

Fig. 5 represented for the STTD scheme in the transmit diversity, from the emission pilot frequency mode on the common pilot channel of first antenna with from the relation between the emission pilot frequency mode of the common pilot pattern of second antenna;

Fig. 6 is the block diagram of the structure of the portable terminal shown in the presentation graphs 1;

Fig. 7 is the block diagram of the structure of the base band signal process part shown in the presentation graphs 6;

Fig. 8 is the block diagram of the structure of the route searching part shown in the presentation graphs 7;

Fig. 9 is the block diagram of the structure of removing expansion shown in the presentation graphs 8;

Figure 10 is the block diagram of the structure of the in-phase component shown in the presentation graphs 8;

Figure 11 is in the expression first embodiment of the invention, the schematic diagram of asking the power average value process of partial common pilot blocks;

Figure 12 is in the expression first embodiment of the invention, the schematic diagram of asking the power average value process of dedicated pilot piece;

Figure 13 is the block diagram of expression according to the structure of the route searching part of second embodiment of the invention;

Figure 14 is in the expression second embodiment of the invention, the schematic diagram of asking the power average value process of partial common pilot blocks;

Figure 15 is in the expression second embodiment of the invention, the schematic diagram of asking the power average value process of dedicated pilot piece.

Embodiment

＜the first embodiment 〉

Below with reference to accompanying drawing, the first embodiment of the present invention is described.

As shown in fig. 1, DS-CDMA system of the present invention (wherein cellular telephone 100 is used as portable terminal) adopts two transmitting antenna A1 and A2 in base station BS.In the DS-CDMA system, from base station BS to the cellular telephone transmitted radio signal, adopt transmit diversity with two branches.Notice that above mentioned STTD method is used as the emission diversity method in the embodiments of the invention, the DS-CDMA system that adopts among the present invention meets the standard of W-CDMA.

In the DS-CDMA of present embodiment system, comprise that the predetermined channel of DPCH (DPCH) and common pilot channel (CPICH) is used as from the send channel of base station BS to cellular telephone 100.Because DPCH is the two-way channel between base station and the cellular telephone 100, in the following description, the send channel of 100 DPCH is called as " downlink dedicated physical channels " from the base station BS to the cellular telephone.Each radio frame that sends cellular telephone 100 by downlink dedicated physical channels from base station BS to is by as shown in Figure 2 15 time slot Slot _i(i=0～14) are formed.Each time slot Slot _iForm by data 1 field, TPC field, TFCI field, data 2 fields and pilot field.Below, the set of pilot symbols that will transmit in pilot field is called as " dedicated pilot piece DPB ", and the pattern of set of pilot symbols is called as " dedicated pilot pattern DPL ".When specifying pilot blocks or pilot frequency mode respectively, in the following description, time slot Slot _iIn dedicated pilot piece DPB be called as " dedicated pilot piece DPB _i", time slot Slot _iIn dedicated pilot pattern DPL be called as " dedicated pilot pattern DPL _i".

When passing through the dedicated downlink physical channel, utilize the STTD method in the transmit diversity, during from the base station BS radio frames, the radio frame signal carries out corresponding respectively in the STTD method routine modulation of transmitting antenna A1 and A2, as shown in Figure 3, so that produce modulation signal.Utilize shared extended code expansion modulation signal subsequently, so that launch these modulation signals from transmitting antenna A1 and A2 simultaneously.

As shown in Figure 3, modulation is not included in time slot Slot about antenna A1 _iIn symbol sebolic addressing S ₀, S ₁... in each complex symbol S _m(=b _2m+ jb _2m+1b _xBe the position, j is an imaginary unit, m=0,1 ...).On the other hand, about antenna A2, a pair of initial symbol (S _n, S _N+1: n=0,1 ...) be modulated into pair of symbols (S _N+1 ^*, S _n ^*).Thereby, from the pattern of the symbol sebolic addressing of antenna A1 emission with from the orthogonal mode of the symbol sebolic addressing of antenna A2 emission.

STTD method in the transmit diversity just in time can not be applied to the dedicated pilot piece in the downlink dedicated physical channels.But, lead the symbol sebolic addressing of step piece and from the symbol sebolic addressing quadrature of the dedicated pilot piece of antenna A2 emission from the special use of antenna A1 emission.

Each radio frame that sends cellular telephone 100 by common pilot channel from base station BS to is by as shown in Figure 4 15 time slot Slot _i(i=0～14) are formed.Below, be sent to time slot Slot _iSet of pilot symbols in (i=0～14) is called as " common pilot piece CPB ".Time slot Slot _iIn common pilot piece CPB be called as " common pilot piece DPB _i".

In the present embodiment, as described later, the part by utilizing dedicated pilot piece DPB or common pilot piece (below be called " partial common pilot blocks PCB ") is carried out route searching.Partial common pilot blocks PCB is positioned at the identical position with dedicated pilot piece DPB in time slot, and has the symbol with dedicated pilot piece DPB similar number.Below, time slot Slot _iIn partial common pilot blocks PCB be called as " partial common pilot blocks CPB _i".In addition, the pattern of partial common pilot blocks CPB is called as " partial common pilot frequency mode PCP ", and time slot Slot _iIn partial common pilot frequency mode PCP be called as " partial common pilot frequency mode PCP _i".

When utilizing transmit diversity, by common pilot channel during, by utilizing two the orthogonal patterns shown in the shared extended code expander graphs 5, and send spread signal simultaneously from the base station BS radio frames.No matter note whether adopting the STTD method,, send emission pilot frequency mode in the common pilot channel of emission pilot frequency mode the common pilot channel pattern of antenna A1 as shown in Figure 5 and antenna A2 from base station BS all according to the standard of W-CDMA.

As shown in Figure 6, the emission of radio frequency signals processing section 84 that the duplexer (DUP) 82 that cellular telephone 100 comprises antenna 81, link to each other with antenna 81, the radiofrequency signal Return Reception Dept. that links to each other with duplexer 82 divide 83, link to each other with duplexer 82 and divides 83 and the base band signal process part 85 that links to each other of emission of radio frequency signals processing section 84 with the radiofrequency signal Return Reception Dept..

Duplexer 82 separates from radio-frequency transmissions processing section 84 to antenna 81 the electric current that transmits and divides the electric current of 83 received signal from antenna 81 to the radio frequency Return Reception Dept..Duplexer 82 prevents transmitting and the interference of received signal.

Return Reception Dept. divides 83 synthesizers that comprise received signal, changes the frequency mixer of the frequency of received signal, utilizes the quadrature demodulation phase part and the appropriate amplifier and the filter (these are not shown) that is provided with of orthogonal PSK (QPSK) method restituted signal.Simplified Return Reception Dept. in this specification and divided being described in more detail of 83 structure, because to one skilled in the art, this structure is well-known.Return Reception Dept. divides 83 received signals with radio frequency to change over the baseband receiving signals RS with baseband signal, so that baseband receiving signals RS is sent to base band signal process part 85.Notice that baseband receiving signals is the complex signal with in-phase component (I component) and quadrature component (Q component).

Emission processing section 84 comprises the quadrature modulation part (QPM) of carrying out the QPSK modulation, the frequency that transmits is changed over the frequency mixer of radio frequency from base band frequency, the synthesizer of transmit frequency signal and appropriate amplifier and the filter (these are not shown) that is provided with.Simplified being described in more detail of structure of emission processing section 84 in this specification, because to one skilled in the art, this structure is well-known.With reference in control signal CS and DT that base band signal process part 85 is sent, emission processing section 84 is having base band frequency, and changes over from the transmitting baseband signal TS that base band signal process part 85 is sent and to have transmitting of radio frequency.Notice that be similar to aforesaid baseband receiving signals RS, base band transmit TS also is the complex signal with in-phase component (I component) and quadrature component (Q component).

Cellular telephone 100 also comprises the microprocessor (MPU) 86 that links to each other with base band signal process part 85, digital signal processor (DSP) 87 and codec (CODEC) 88.

The whole cellular telephone 100 of MPU 86 controls.Input unit 92 such as keyboard links to each other with MPU 86 with the display 91 such as LCD.When user's input device input data, described data send to MPU 86 from input unit, and MPU 86 receives the data of input, and according to the type of importing data, the content that shows the input data on display 91 perhaps sends to base band signal process part 85 to the input data.For example, when MPU 86 receives with input unit 92 communicate by letter user's telephone number data, MPU 86 shows this telephone number on display 91 so that user's affirmation.Subsequently, receive from a certain suitable moment after the call request of input unit 92 at MPU 86, MPU 86 sends to baseband signal processor 85 to this telephone number data.

DSP 87 handles the digital signal of sending from base band signal process part 85 under the control of MPU 86.CODEC 88 becomes digitized sound signal to sound signal encoding between the loud speaker 93 and microphone 94 that link to each other with CODEC 88, and the digitized sound signal decoding is from voice signal.That is, convert analoging sound signal to by CODEC 88, and, reproduce sound/speech according to analoging sound signal by utilizing loud speaker 93 from the digitized sound signal of base band signal process part 85.Analoging sound signal by microphone 94 inputs is converted into the digital acoustic sound data by CODEC 88, and the digital acoustic sound data is sent to base band signal process part 85 subsequently, as the emission voice data.

As shown in Figure 7, base band signal process part 85 comprises and is used to handle mould-number (A/D) conversion portion 1 that divides the 83 baseband receiving signals RS that send from Return Reception Dept., Cell searching part (CSR) 2, route searching part (PSR) 3, control channel receiving unit (BCHRR) 4, communication channel receiving unit (TCHRR) 6 and reception buffer (RBUF) 5.Base band signal process part 85 also comprises the transmit buffer (TBUF) 9 that is used to produce the base band transmit TS that will be sent to emission processing section 84, and (roll off) filter (RNF) 7 is produced in radiating portion (TR) 8 and emission.Base band signal process part 85 also comprises the control section (CTRL1) 11 of the emission control part (RFC) 10 and the whole base band signal process part 85 of control of control emission processing section 84.

A/D conversion portion 1 has the A/D converter of the I component that is used for baseband receiving signals RS (below be called " signal RSI ") and is used for the A/D converter of the Q component of baseband receiving signals RS (below be called " signal RSQ ").The digital signal RSD that obtains as the result of the AD conversion of the baseband receiving signals RS by A/D conversion portion 1 is sent to Cell searching part 2, route searching part 3, control channel receiving unit 4 and communication channel receiving unit 6.

Notice that in the following description the result of the A/D of 1 couple of signal RSI of A/D conversion portion conversion is called as " I component received signal RDI ", the result of the A/D conversion of 1 couple of signal RSQ of A/D conversion portion is called as " Q component received signal RDQ ".In addition, I component received signal RDI and Q component received signal RDQ are commonly referred to as " received signal RSD ".

Cell searching part 2 is carried out so-called initial synchronisation timing and is extracted according to the correlation between received signal RSD and the predetermined extended sign indicating number in the down link of the base station that must set up radio link from cellular telephone 100 with it.The initial synchronisation timing is extracted and is comprised that slot synchronization timing extraction and frame synchronization timing extraction, the signal RSD of reception comprise by primary synchronization channel (P-SCH), secondary synchronization channel (S-SCH) and the shared signal component of leading step channel (CPICH) reception.After extracting slot synchronization timing and frame synchronization timing, Cell searching part 2 determines to set up with it the employed scrambling code in base station of radio link.Cell searching part 2 comprises matched filter or some correlation calculators that is used to calculate aforementioned correlation.Notice that Cell searching part 2 not only extracts the search of initial zone of initial synchronisation, but also carry out the peripheral cell search for soft handover.

Slot synchronization timing and frame synchronization timing that Cell searching part 2 extracts are sent to route searching part 3, control channel receiving unit 4 and communication channel receiving unit 6.The scrambling code that Cell searching part 2 is determined is sent to MPU86 by MPU bus B 2 and MPU interface 12.Attention is in Fig. 7, and slot synchronization timing and frame synchronization timing are expressed as " CTRLS2 ".

When after Cell searching part 2 is carried out search of initial zone, when so-called multipath phenomenon takes place in 100 signal from the base station BS to the cellular telephone transmits, route searching part 3 is determined differing between the path according to received signal RSD and while timing CTRLS (slot synchronization timing or the like).The structure of route searching part is described below.

In order to realize the various controls to cellular telephone 100, control channel receiving unit 4 extracts from received signal RSD from the control data of base station BS emission and decodes.Control channel receiving unit 4 goes expansion by utilizing scrambling code (extended code), the RAKE-combination of synchronous detecting and extraction control data.Thereby control channel receiving unit 4 comprises sliding correlation detector, synchronizing indicator, RAKE combiner (these are not shown in the drawings).Control channel receiving unit 4 sends to reception buffer 5 to the control datas that will decode that extract (below call " decoding control data ").The decoding control data that temporarily is kept in the reception buffer 5 is sent to MPU 86 by MPU bus B 2 and MPU interface 12.

The data that communication channel receiving unit 6 extracts from the communication channel that base station BS sends are decoded.In order to extract communication channel signal, communication channel receiving unit 6 utilizes scrambling code (extended code) to go expansion, synchronous detecting and RAKE combination.So control channel receiving unit 6 comprises sliding correlation detector, synchronizing indicator and RAKE combiner (these are not shown in the drawings).Communication channel receiving unit 6 sends to reception buffer 5 to the data that will decode that extract (below call " decoded data ").The decoded data that temporarily is kept in the reception buffer 5 is sent to MPU 86 by MPU bus B 2 and MPU interface 12, perhaps is sent to DSP 87 by dsp bus B1 and dsp interface 13.

Radiating portion 8 produces by the data in the transmit buffer 9 being multiply by transmitting that extended code obtains.These data are sent to transmit buffer 9 by MPU bus B 2 from MPU 86 or CODEC 88, perhaps are sent to transmit buffer 9 by dsp bus B1 from DSP 87, so that interim the preservation.So radiating portion 8 comprises the multiplier that the emission data be multiply by the predetermined extended sign indicating number.Produce filter 7 by emission, what radiating portion 8 produced transmits by shaping, and subsequently, transmitting after the shaping is sent to emission processing section 84.

According to by MPU interface 12 and MPU bus B 2, come from the instruction of MPU 86, control section RFC is all the control signal CS and the DT of control emission processing section 84 send to emission processing section 84.

Except above-mentioned these controls according to the instruction that comes from MPU 86 by MPU interface 12 and MPU bus B 2, control section CTRL1 finishes other control in the cellular telephone 100.

As shown in Figure 8, route searching part 3 comprises: (a) interim received signal RSD (RDI, the input buffer of sending here from A/D conversion portion 1 21 RDQ) of preserving; (b) remove expansion 22 to what the I component received signal RDI that sends here from input buffer 21 and Q component received signal RDQ went to expand respectively; (c) go spread signal ISI and Q component to go the stem portion mutually 23 of removing the modification component of pilot frequency mode in the pilot blocks the spread signal ISQ from the I component that goes expansion 22 to send certainly, wherein pilot frequency mode corresponds respectively to antenna A1 and the A2 in the base station BS.Phase stem portion 23 is sent the I component signal PLI corresponding to antenna A1 ₁With Q component signal PLQ ₁With corresponding to the I component signal PLI of antenna A2 ₂With Q component signal PLQ ₂

Route searching part 3 also comprises: (d) finish each I component signal PLI in the symbol period separately ₁With Q component signal PLQ ₁The relevant adder 24 of relevant addition ₁And finish each I component signal PLI in the symbol period separately ₂With Q component signal PLQ ₂The relevant adder 24 of relevant addition ₂(e) calculate from relevant adder 24 ₁In the result's that obtains of relevant addition the average power of mean value of signal power calculate device 25 ₁And calculate by relevant adder 24 ₂In the result's that obtains of relevant addition the average power of mean value of signal power calculate device 25 ₂(f) have to be used for preserving and calculate device 25 by average power ₁In the result's that obtains of calculating memory 26 ₁Calculate device 25 with being used for preserving by average power ₂In the result's that obtains of calculating memory 26 ₂The delay abridged table produce part 26; And, select the delay abridged table built-up section 27 of synthetic delay abridged table for multipath (g) according to delay abridged table by 26 generations of delay abridged table generation part corresponding to antenna A1 and A2.

Note, in the present embodiment, the delay abridged table that MPU 86 selects according to multipath, selection will be used in the multipath in the RAKE combination.

Be sent to route searching part 3 by the basic timing of fundamental clock generation part (not shown) generation and the time synchronisation CTRLS2 that produces by Cell searching part 2.Route searching part 3 is determined frame boundaries by utilizing these timing, the position of boundary of time slot and pilot blocks, and carry out route searching.

As shown in Figure 9, go expansion 22 to comprise matched filter (MF) 31, produce the code generator 33C that goes extended code of common pilot and the code generator 33D that goes extended code of generation dedicated pilot.Signal is to (CSCI, CSCQ) the I component CSCI that goes extended code and the Q component CSCQ of the common pilot that is produced by code generator 33C form, signal is to (DSCI, DSCQ) the I component DSCI that goes extended code and the Q component DSCQ of the dedicated pilot that is produced by code generator 33D form.Signal to (CSCI, CSCQ) and signal to (DSCI DSCQ) is sent to multiplexer 32.According to passing through MPU interface 12 and MPU bus B 2, from the selection instruction signal SMC that MPU 86 sends, signal is to (CSCI, CSCQ) or signal to (DSCI, DSCQ) be sent to matched filter 31 from multiplexer 32, as select go extended code to (SSCI, SSCQ).

Going in the expansion 22 of configuration as mentioned above, by utilizing according to the instruction that comes from MPU86, the selection of selecting by multiplexer 32 go extended code to (SSCI, SSCQ), to the signal that receives to (RDI RDQ) goes expansion.Subsequently, go expansion 22 the result who goes to expand be output as spread signal to (ISI, ISQ).

As shown in Figure 10, phase stem portion 23 comprises the method according to STTD, the first signal extraction part 23 of the pilot blocks that the antenna A1 of extraction from base station BS sends ₁The secondary signal of the pilot blocks of sending with the antenna A2 that extracts from the base station extracts part 23 ₂

The first signal extraction part 23 ₁Comprise multiplication of complex numbers calculating section 41 ₁, the signal that produces the common pilot of sending from antenna A1 is to (CCPI ₁, CCPQ ₁) code generator 43C ₁, signal is to (CCPI ₁, CCPQ ₁) by the signal of forming corresponding to the I component of the conjugate complex number code of the modulation code of respective antenna and Q component and producing the dedicated pilot that sends from antenna A2 to (DCPI ₁, DCPQ ₁) code generator 43D ₁, signal is to (DCPI ₁, DCPQ ₁) form by I component and Q component corresponding to the conjugate complex number code of the modulation code of respective antenna.Code generator 43C ₁The signal that produces is to (CCPI ₁, CCPQ ₁) and code generator 43D ₁The signal that produces is to (DCPI ₁, DCPQ ₁) be sent to multiplexer 42 ₁According to the selection instruction signal SMC that sends from MPU 86, signal is to (CCPI ₁, CCPQ ₁) or signal to (DCPI ₁, DCPQ ₁) select signal to (SPCI as first ₁, SCPQ ₁) from multiplexer 42 ₁Send to multiplication of complex numbers calculating section 41 ₁

As above Pei Zhi the first signal extraction part 23 ₁Calculating goes spread signal to (ISI is ISQ) with multiplexer 42 ₁According to selecting signal to (SPCI from first of the Instruction Selection of MPU 86 ₁, SCPQ ₁) product, thereby the first signal extraction part 23 ₁The pilot blocks that extraction is sent from antenna A1.First extracts part 23 ₁Output is extracted the signal of acquisition to (PLI ₁, PLQ ₁).

Second extracts part 23 ₂Be configured to and the first signal extraction part 23 ₁Identical.Second extracts part 23 ₂Comprise multiplication of complex numbers calculating section 41 ₂The signal of the common pilot that generation is sent from antenna A2 is to (CCPI ₂, CCPQ ₂) code generator 43C ₂, signal is to (CCPI ₂, CCPQ ₂) by I component CCPI corresponding to the conjugate complex number code of the modulation code of respective antenna ₂With Q component CCPQ ₂Form; With the signal that produces the dedicated pilot that sends from antenna A2 to (DCPI ₂, DCPQ ₂) code generator 43D ₂, signal is to (DCPI ₂, DCPQ ₂) by I component DCPI corresponding to the conjugate complex number code of the modulation code of respective antenna ₂With Q component DCPQ ₂Form.Code generator 43C ₂The signal that produces is to (CCPI ₂, CCPQ ₂) and code generator 43D ₂The signal that produces is to (DCPI ₂, DCPQ ₂) be sent to multiplexer 42 ₂, according to the selection instruction signal SMC that sends from MPU 86, signal is to (CCPI ₂, CCPQ ₂) or signal to (DCPI ₂, DCPQ ₂) select signal to (SPCI as first ₂, SCPQ ₂) from multiplexer 42 ₂Send to multiplication of complex numbers calculating section 41 ₂

As above Pei Zhi the first signal extraction part 23 ₂Calculating goes spread signal to (ISI ISQ) selects signal to (SPCI with second ₂, SCPQ ₂) product, thereby secondary signal extracts part 23 ₂The pilot blocks that extraction is sent from antenna A2.Second extracts part 23 ₂Output is extracted the signal of acquisition to (PLI ₂, PLQ ₂).

To illustrate below under the control of MPU 86, as above the path search pass in Pei Zhi the route searching part 3.

In the following description, suppose that Cell searching part 2 finished the search of initial zone that carries out after the power supply of opening cellular telephone 100.It is that send relevant with the down link that leaves the base station from Cell searching part 2 to suppose also that in addition route searching part 3 obtains, and relevant slot synchronization timing and the frame synchronization timing in base station that must set up radio link with it with cellular telephone 100.

At first the route searching of partial common pilot blocks PCB is used in explanation.Just use the route searching of partial common pilot blocks PCB, by utilizing the selection instruction signal SMC through MPU interface 12 and MPU bus B 2, MPU 86 is to going expansion 22 and the instruction of stem portion 23 transmission use partial common pilot blocks PCB mutually.Receiving the going in the expansion 22 of this instruction, multiplexer 32 goes the extended code signal to (CSCI, CSCQ) (promptly be used in base station BS expand extended code signal to) to what matched filter 31 sent the part common pilot.In the phase stem portion 23 that receives this instruction, multiplexer 42 ₁To the first signal extraction part 23 ₁In multiplication of complex numbers calculating section 41 ₁The signal that sends the part common pilot is to (CCPI ₁, CCPQ ₁), multiplexer 42 ₂ Extract part 23 to secondary signal ₂In multiplication of complex numbers calculating section 41 ₂The signal that sends the part common pilot is to (CCPI ₂, CCPQ ₂).

Under this state, when route searching part 3 receives that received signal is to (RDI, in the time of RDQ), received signal is to (RDI RDQ) is kept in the input buffer 21, so that export to expansion 22 temporarily.Receive that when removing expansion 22 received signal is to (RDI, RDQ) time, matched filter 31 is by utilizing basic timing and the control signal CTRLS2 (slot synchronization timing and frame synchronization timing) that sends from Cell searching part 2, calculate received signal to (RDI, RDQ) and go the extended code signal to (CSCI, CSCQ) correlation between.Go expansion 22 to go the result calculated conduct that obtains correlation spread signal to (ISI ISQ) sends to phase stem portion 23.

Reception go spread signal to (ISI, in the phase stem portion 23 ISQ), multiplication of complex numbers calculating section 23 ₁Calculating go spread signal to (ISI, ISQ) and signal to (CCPI ₁, CCPQ ₁) the multiplication of complex numbers and.The first signal extraction part 23 ₁The multiplication of complex numbers that obtains antenna A1 and result calculated, signal is to (PLI ₁, PLQ ₁) send to relevant addition section 24 ₁

On the other hand, in phase stem portion 23, multiplication of complex numbers calculating section 23 ₂Calculating go spread signal to (ISI, ISQ) and signal to (CCPI ₂, CCPQ ₂) the multiplication of complex numbers and.Secondary signal extracts part 23 ₂The multiplication of complex numbers that obtains antenna A2 and result calculated, signal is to (PLI ₂, PLQ ₂) send to relevant addition section 24 ₂

Received signal is to (PLI ₁, PLQ ₁) relevant addition section 24 ₁Sampled point in being present in some time slots is finished homophase (I) component PLI ₁The relevant addition of amplitude, and, finish quadrature (Q) component PLQ at described sampled point ₁The relevant addition of amplitude, wherein arrange sampled point with the symbol period in the pilot blocks.For example, as shown in Figure 11, relevant addition section 24 ₁Be present in 2 time slot (Slot subsequently respectively _K-2, Slot _K-1) and continuous 2 time slot (Slot _k, Slot _K+1) in sampled point, finish I component PLI ₁The relevant addition of amplitude, described 2 time slot (Slot subsequently _K-2, Slot _K-1) and continuous 2 time slot (Slot _k, Slot _K+1) be included in (Slot in 4 time slots subsequently _K-2, Slot _K-1, Slot _k, Slot _K+1), wherein arrange sampled point with the symbol period in the pilot blocks.Relevant addition section 24 ₁Also carry out and above-mentioned I component PLI ₁Identical Q component PLQ ₁The relevant addition of amplitude.That is relevant addition section 24, ₁Respectively to two partial common pilot blocks (PCB _K-2, PCB _K-1) carry out I component PLI ₁With Q component PLQ ₁Relevant addition, and respectively to two partial common pilot blocks (PCB _k, PCB _K+1) carry out I component PLI ₁With Q component PLQ ₁Relevant addition.

On the other hand, as in relevant addition section 24 ₁In like that, received signal is to (PLI ₂, PLQ ₂) relevant addition section 24 ₂Sampled point in being present in some time slots is to I component PLI ₂With Q component PLQ ₂The amplitude addition that is concerned with, wherein arrange sampled point with the sample cycle in the pilot blocks.

Relevant addition section 24 ₁In the result of relevant addition be sent to average power and calculate device 25 ₁, relevant addition section 24 ₂In the result of relevant addition be sent to average power and calculate device 25 ₂

Average power is calculated device 25 ₁I component IAI according to the result of relevant addition ₁With Q component IAQ ₁, signal calculated power (related power).Subsequently, average power is calculated device 25 ₁By utilizing the average power of symbol period calculating sampling signal, carry out signal power, promptly the cyclic integral of related power calculates.For example, as shown in Figure 11, average power is calculated device 25 ₁Calculate the average power (AVP) in 4 time slots.Average power is calculated device 25 ₁The power average value AVP that calculates ₁Send to the memory 26 that postpones in the abridged table generation part 26 ₁

On the other hand, average power is calculated device 25 ₂I component IAI according to the result of relevant addition ₂With Q component IAQ ₂, signal calculated power (related power) is so that the average power of calculating sampling signal.Average power is calculated device 25 ₂The power average value AVP that calculates ₂Send to the memory 26 that postpones in the abridged table generation part 26 ₂

Postpone abridged table and produce part 26 the power average value AVP of sample signal ₁Order is kept at memory 26 ₁In, and produce and come from the delay abridged table DPF of the received signal correspondence of antenna A1 ₁Postpone abridged table and produce part 26 the power average value AVP of sample signal ₂Order is kept at memory 26 ₂In, and produce and come from the delay abridged table DPF of the received signal correspondence of antenna A2 ₂

Delay abridged table built-up section 27 bases produce as mentioned above, corresponding to the delay abridged table DPF of antenna A1 and A2 ₁And DPF ₂, the delay abridged table that is used to select multipath that synthetic antenna A1 and A2 are shared.Postpone abridged table built-up section 27 by MPU bus B 2 and MPU interface 12, be used to select the delay abridged table of multipath to MPU 86 reports.

The numerical value that MPU 86 extracts power average value is not less than the sampling location of predetermined threshold, and calculates antenna A1 and the shared path-phase information of A2.MPU 86 carries out the multipath selection subsequently.As the result who handles as mentioned above, the multipath (timing of multipath) that MPU 86 acquisitions will be adopted in the RAKE combination.

Subsequently, MPU 86 sends to control channel receiving unit 4 and communication channel receiving unit 6 to the multipath that obtains as mentioned above, as the multipath that will adopt in the RAKE combination.The timing of control channel receiving unit 4 and communication channel receiving unit 6 bases and the multipath correspondence that receives from MPU 86 is carried out the RAKE combination to the signal that receives.

The route searching that uses dedicated pilot piece DPB is described below.Just use the route searching of dedicated pilot piece DPB, by utilizing the selection instruction signal SMC through MPU interface 12 and MPU bus B 2, MPU 86 is to going expansion 22 and the instruction of stem portion 23 transmission use dedicated pilot piece DPB mutually.Thereby, receiving the going in the expansion 22 of this instruction, multiplexer 32 to matched filter 31 send dedicated pilots go the extended code signal to (DSCI, DSCQ).In the phase stem portion 23 that receives this instruction, multiplexer 42 ₁To the first signal extraction part 23 ₁In multiplication of complex numbers calculating section 41 ₁The signal that sends special-purpose common pilot is to (DCPI ₁, DCPQ ₁), multiplexer 42 ₂ Extract part 23 to secondary signal ₂In multiplication of complex numbers calculating section 41 ₂The signal that sends dedicated pilot is to (DCPI ₂, DCPQ ₂).

In this case, receive that received signal is to (RDI, in the time of RDQ), received signal is to (RDI RDQ) is kept in the input buffer 21, so that export to expansion 22 temporarily when route searching part 3.Receiving that received signal is to (RDI, going in the expansion 22 RDQ), matched filter 31 is by utilizing basic timing and/or the control signal CTRLS2 (slot synchronization timing and frame synchronization timing) that sends from Cell searching part 2, calculate received signal to (RDI, RDQ) and go the extended code signal to (DSCI, DSCQ) correlation between.Go expansion 22 the result calculated that obtains correlation, go spread signal (ISI ISQ) sends to phase stem portion 23.

Reception go spread signal to (ISI, in the phase stem portion 23 ISQ), the first signal extraction part 23 ₁Calculating go spread signal to (ISI, ISQ) and signal to (DCPI ₁, DCPQ ₁) the multiplication of complex numbers and.The first signal extraction part 23 ₁The multiplication of complex numbers that obtains antenna A1 and result calculated, signal is to (PLI ₁, PLQ ₁) send to relevant addition section 24 ₁

On the other hand, in phase stem portion 23, secondary signal extracts part 23 ₂Calculating go spread signal to (ISI, ISQ) and signal to (DCPI ₂, DCPQ ₂) the multiplication of complex numbers and.Second extracts part 23 ₂The multiplication of complex numbers that obtains antenna A2 and result calculated, signal is to (PLI ₂, PLQ ₂) send to relevant addition section 24 ₂

Received signal is to (PLI ₁, PLQ ₁) relevant addition section 24 ₁Sampled point in being present in some time slots is finished homophase (I) component PLI ₁The relevant addition of amplitude, and the described sampled point in being present in some time slots is finished quadrature (Q) component PLQ ₁The relevant addition of amplitude, wherein arrange sampled point with the symbol period in the pilot blocks.For example, as shown in Figure 12, relevant addition section 24 ₁Be present in 2 time slot (Slot subsequently respectively _K-2, Slot _K-1) and continuous 2 time slot (Slot _k, Slot _K+1) in sampled point, finish I component PLI ₁The relevant addition of amplitude, described 2 time slot (Slot subsequently _K-2, Slot _K-1) and continuous 2 time slot (Slot _k, Slot _K+1) be included in 4 time slot (Slot subsequently _K-2, Slot _K-1, Slot _k, Slot _K+1) in, wherein arrange sampled point with the symbol period in the pilot blocks.Relevant addition section 24 ₁Also carry out and above-mentioned I component PLI ₁Identical Q component PLQ ₁The relevant addition of amplitude.That is relevant addition section 24, ₁Respectively to two partial common pilot blocks (DPL _K-2, DPL _K-1) carry out I component PLI ₁With Q component PLQ ₁Relevant addition, and respectively to two partial common pilot blocks (DPL _k, DPL _K+1) carry out I component PLI ₁With Q component PLQ ₁Relevant addition.

Average power is calculated device 25 ₁I component IAI according to the result of relevant addition ₁With Q component IAQ ₁, signal calculated power (related power).Subsequently, average power is calculated device 25 ₁By utilizing the average power of symbol period calculating sampling signal, the cyclic integral that carries out related power calculates.For example, as shown in Figure 12, average power is calculated device 25 ₁Calculate the average power (AVP) in 4 time slots.Average power is calculated device 25 ₁The power average value AVP that calculates ₁Send to the memory 26 that postpones in the abridged table generation part 26 ₁

On the other hand, average power is calculated device 25 ₂I component IAI according to the result of relevant addition ₂With Q component IAQ ₂, calculate related power, so that the average power of calculating sampling signal.Average power is calculated device 25 ₂The power average value AVP that calculates ₂Send to the memory 26 that postpones in the abridged table generation part 26 ₂

The same with the situation of the route searching that uses partial common pilot blocks PCB, postpone abridged table and produce part 26 the power average value AVP of sample signal ₁Order is kept at memory 26 ₁In, and produce and come from antenna A ₁The delay abridged table DPF of received signal correspondence ₁Postpone abridged table and produce part 26 the power average value AVP of sample signal ₂Order is kept at memory 26 ₂In, and produce and come from the delay abridged table DPF of the received signal correspondence of antenna A2 ₂The same with the situation of the route searching that uses partial common pilot blocks PCB, delay abridged table built-up section 27 bases produce as mentioned above, corresponding to the delay abridged table DPF of antenna A1 and A2 ₁And DPF ₂, the delay abridged table that is used to select multipath that synthetic antenna A1 and A2 are shared.Postpone abridged table built-up section 27 by MPU bus B 2 and MPU interface 12, be used to select the delay abridged table of multipath to MPU 86 reports.

Be similar to the route searching that uses the partial common pilot blocks, MPU 86 carries out multipath subsequently and selects, thereby obtains to be used for the multipath (timing of multipath) of RAKE combination.Subsequently, MPU 86 sends to control channel receiving unit 4 and communication channel receiving unit 6 to the multipath that obtains as mentioned above, as the multipath that will adopt in the RAKE combination.The timing of control channel receiving unit 4 and communication channel receiving unit 6 bases and the multipath correspondence that receives from MPU 86 is carried out the RAKE combination to the signal that receives.

As mentioned above, phase stem portion 23 is calculated go that expansion 22 obtains remove spread signal and distribute to the multiplication of complex numbers between each conjugate complex number pattern of antenna A1 and A2 respectively; Going pilot blocks in the spread signal to be divided into corresponding to the pilot blocks part of antenna A1 with corresponding to the pilot blocks part of antenna A2.Postpone abridged table and produce the delay abridged table that part 26 produces the signal that sends from antenna A1 and A2 respectively, utilize the signal that separates to produce described delay abridged table, postpone abridged table built-up section 27 combinatorial delays abridged tables subsequently, obtain to be used to select the delay abridged table of multipath.Subsequently, MPU 86 carries out multipath and selects according to the delay abridged table that is used to select multipath.According to the first embodiment of the present invention, in the DS-CDMA system that adopts transmit diversity, carry out route searching exactly.

In first embodiment, the sampled point of route searching part 3 in being present in some subsequent timeslots, to the amplitude of the in-phase component in each separation signal addition that is concerned with, and the sampled point in some subsequent timeslots, to the amplitude of the quadrature component in each separation signal addition that is concerned with, wherein regularly arrange sampled point in the symbol period in some pilot blocks.Subsequently, the mean value of signal calculated power, and, produce the delay abridged table according to the signal power of calculating.According to the first embodiment of the present invention, suppressed from the interference of background noise and interference components reception.

In addition, because cellular telephone 100 comprises the route searching part 3 of accurately carrying out route searching, therefore receive the quality that the reception that improved cellular telephone 100 is handled based on the route searching result's of pin-point accuracy RAKE.

Among first embodiment, route searching part 3 can be carried out route searching continuously; Wherein in route searching, use partial common pilot blocks or dedicated pilot piece separately,,, be used alternatingly partial common pilot blocks and dedicated pilot piece by closing the pilot blocks that is not used perhaps according to the time.

In addition, when each route searching for use partial common pilot blocks, perhaps use the route searching of dedicated pilot piece to provide from going expansion 22 when postponing resource that abridged table produces part, route searching that uses the partial common pilot blocks and the route searching that uses the dedicated pilot piece can walk abreast.

In addition, though utilize the partial common pilot blocks to finish route searching in the above embodiments, also can utilize whole common pilot piece to finish route searching.In addition, in the above embodiments, also can be by utilizing whole or part dedicated pilot piece is finished route searching.

In addition, among the top embodiment,,, do not pass by expansion 22 and can comprise some correlators yet as the resource of correlation calculations though go expansion 22 to comprise matched filter, rather than matched filter.

In addition, for the number of time slot that in relevant addition or calculating average power, uses,, then can select arbitrary number if number of time slot is a plural number.

In addition, among the top embodiment, select, select but DSP87 also can carry out multipath though MPU 86 carries out multipath.

＜the second embodiment 〉

Below with reference to the description of drawings second embodiment of the present invention.When second embodiment and first embodiment are compared, has only the structure difference of route searching part.So, below difference will be described mainly.Notice that identical symbol is endowed parts identical or that be equal to, and omit the description that repeats in the following description.

As shown in Figure 13, be similar to first embodiment, the route search unit branch comprises: (a) received signal RSD (RDI, the input buffer 21 RDQ) sent here from A/D conversion portion 1 of buffer memory; (b) remove expansion 22 to what the I component received signal RDI that sends here from input buffer 21 and Q component received signal RDQ went to expand respectively; (c) go spread signal ISI and Q component to go the stem portion mutually 23 of removing the modulation product of pilot frequency mode in the pilot blocks the spread signal ISQ from the I component that goes expansion 22 to send certainly; Wherein pilot frequency mode corresponds respectively to antenna A1 and the A2 in the base station BS.The I component signal PLI that phase stem portion 23 sends corresponding to antenna A1 ₁With Q component signal PLQ ₁With corresponding to the I component signal PLI of antenna A2 ₂With Q component signal PLQ ₂

Route searching part 3 also comprises: (d) calculating has I component PLI ₁With Q component signal PLQ ₁The average power of mean value of power of signal calculate device 25 ₁' and calculating have I component PLI ₂With Q component signal PLQ ₂The average power of mean value of power of signal calculate device 25 ₂'; (e) have and be used for preserving by using average power to calculate device 25 ₁' in the result's that obtains of calculating memory 26 ₁Calculate device 25 with being used for preserving by average power ₂' in the result's that obtains of calculating memory 26 ₂The delay abridged table produce part 26; And (f) according to producing the delay abridged table that part 26 produces, for multipath is selected the synthetic delay abridged table built-up section 27 that postpones abridged table by postponing abridged table.

The following describes according to second embodiment, under the control of MPU 86, the path search pass of route searching part 3.

In the following description, suppose that Cell searching part 2 finished the search of initial zone that carries out after the power supply of opening cellular telephone 100.Suppose also that in addition Cell searching part 2 is sending slot synchronization timing relevant with the down link that leaves the base station and frame synchronization timing, the radio link of cellular telephone 100 necessary foundation and described base station.

At first the route searching of partial common pilot blocks PCB is used in explanation.Just use the route searching of partial common pilot blocks PCB, identical with first embodiment, by utilizing the selection instruction signal SMC through MPU interface 12 and MPU bus B 2, MPU 86 is to going expansion 22 and the instruction of stem portion 23 transmission use partial common pilot blocks PCB mutually.

In this case, receive that received signal is to (RDI, in the time of RDQ), received signal is to (RDI RDQ) is kept in the input buffer 21, so that export to expansion 22 temporarily when route searching part 3.Receive that when removing expansion 22 received signal is to (RDI, RDQ) time, matched filter 31 is by utilizing basic timing and the control signal CTRLS2 (slot synchronization timing and frame synchronization timing) that partly sends from Cell searching, calculate received signal to (RDI, RDQ) and go the extended code signal to (CSCI, CSCQ) correlation between.Go expansion 22 the result calculated that obtains correlation, go spread signal (ISI ISQ) sends to phase stem portion 23.

Go spread signal to (ISI in the phase stem portion 23 ISQ), is similar to the situation of first embodiment, the first signal extraction part 23 in reception ₁Calculating go spread signal to (ISI, ISQ) and signal to (CCPI ₁, CCPQ ₁) the multiplication of complex numbers and.In phase stem portion 23, secondary signal extracts part 23 ₂Calculating go spread signal to (ISI, ISQ) and signal to (CCPI ₂, CCPQ ₂) the multiplication of complex numbers and.Subsequently, the first signal extraction part 23 ₁The multiplication of complex numbers that obtains antenna A1 and result calculated, signal is to (PLI ₁, PLQ ₁) send to average power and calculate device 25 ₁', secondary signal extracts part 23 ₂The multiplication of complex numbers that obtains antenna A2 and result calculated, signal is to (PLI ₂, PLQ ₂) send to average power and calculate device 25 ₂'.

Average power is calculated device 25 ₁' signal calculated is to (PLI ₁, PLQ ₁) power.Subsequently, average power is calculated device 25 ₁' by utilizing the average power AVP of symbol period calculating sampling signal ₁, the cyclic integral that carries out related power calculates.For example, as shown in Figure 14, average power is calculated device 25 ₁Average power (AVP) in 4 time slots of ' calculating.Average power is calculated device 25 ₁' the power average value AVP that calculates ₁Send to the memory 26 that postpones in the abridged table generation part 26 ₁

On the other hand, be similar to calculator 25 ₁', average power is calculated device 25 ₂' signal calculated (PLI ₂, PLQ ₂) power.Average power is calculated device 25 ₂' the power average value AVP that calculates ₂Send to the memory 26 that postpones in the abridged table generation part 26 ₁

The same with the situation of first embodiment, postpone abridged table and produce part 26 the power average value AVP of sample signal ₁Order is kept at memory 26 ₁In, and produce and come from the delay abridged table DPF of the received signal correspondence of antenna A1 ₁Postpone abridged table and produce part 26 also the power average value AVP of sample signal ₂Order is kept at memory 26 ₂In, and produce and come from the delay abridged table DPF of the received signal correspondence of antenna A2 ₂

Postpone abridged table built-up section 27 according to delay abridged table DPF corresponding to antenna A1 and A2 ₁And DPF ₂, the synthetic delay abridged table that is used to select multipath.The same with the situation of first embodiment, postpone abridged table built-up section 27 by MPU bus B 2 and MPU interface 12, the delay abridged table that is used to select multipath is sent to MPU 86.The numerical value that MPU 86 extracts power average value is not less than the sampling location of predetermined threshold, and calculates antenna A1 and the shared path-phase information of A2.MPU 86 carries out the multipath selection subsequently.As the result who handles as mentioned above, the multipath (timing of multipath) that MPU 86 acquisitions will be adopted in the RAKE combination.

The route searching that uses dedicated pilot piece DPB among second embodiment will be described below.Just use the route searching of dedicated pilot piece DPB, by utilizing the selection instruction signal SMC through MPU interface 12 and MPU bus B 2, MPU 86 is to going expansion 22 and the instruction of stem portion 23 transmission use dedicated pilot piece DPB mutually.

In this case, receive that received signal is to (RDI, in the time of RDQ), signal is to (RDI RDQ) is buffered in the input buffer 21, so that export to expansion 22 when route searching part 3.Receiving that received signal is to (RDI, going in the expansion 22 RDQ), be similar to first embodiment, matched filter 31 is by utilizing basic timing or the control signal CTRLS2 (slot synchronization timing and frame synchronization timing) that sends from Cell searching part 2, calculate received signal to (RDI, RDQ) and go the extended code signal to (DSCI, DSCQ) correlation between.Go expansion 22 the result calculated that obtains correlation, go spread signal (ISI ISQ) sends to phase stem portion 23.

Reception go spread signal to (ISI, in the phase stem portion 23 ISQ), the first signal extraction part 23 ₁Calculating go spread signal to (ISI, ISQ) and signal to (DCPI ₁, DCPQ ₁) the multiplication of complex numbers and.In relevant portion 23, secondary signal extracts part 23 ₂Same calculate go spread signal to (ISI, ISQ) and signal to (DCPI ₂, DCPQ ₂) the multiplication of complex numbers and.First extracts part 23 ₁The multiplication of complex numbers that obtains antenna A1 and result calculated, signal is to (PLI ₁, PLQ ₁) send to average power and calculate device 25 ₁', secondary signal extracts part 23 ₂The multiplication of complex numbers that obtains antenna A2 and result calculated, signal is to (PLI ₂, PLQ ₂) send to average power and calculate device 25 ₂'.

Average power is calculated device 25 ₁' signal calculated is to (PLI ₁, PLQ ₁) power.Subsequently, average power is calculated device 25 ₁' by utilizing the average power of symbol period calculating sampling signal, the cyclic integral that carries out related power calculates.For example, as shown in Figure 15, average power is calculated device 25 ₁Average power (AVP) in 4 time slots of ' calculating.Average power is calculated device 25 ₁' the power average value AVP that calculates ₁Send to the memory 26 that postpones in the abridged table generation part 26 ₁

On the other hand, be similar to average power and calculate device 25 ₁' situation, average power is calculated device 25 ₂' signal calculated is to (PLI ₂, PLQ ₂) power.Average power is calculated device 25 ₂' the power average value AVP that calculates ₂Send to the memory 26 that postpones in the abridged table generation part 26 ₂

The same with the situation of the route searching that uses partial common pilot blocks PCB, be similar to first embodiment, postpone abridged table and produce part 26 the power average value AVP of sample signal ₁Order is kept at memory 26 ₁In, and produce and from the delay abridged table DPF of the received signal correspondence of antenna A1 ₁Postpone abridged table and produce part 26 also the power average value AVP of sample signal ₂Order is kept at memory 26 ₂In, and produce and from the delay abridged table DPF of the received signal correspondence of antenna A2 ₂

Be similar to the situation of the route searching that uses the partial common pilot blocks, identical with first embodiment, postpone abridged table built-up section 27 according to delay abridged table DPF corresponding to antenna A1 and A2 ₁And DPF ₂, the synthetic delay abridged table that is used to select multipath.The same with the situation of first embodiment, postpone abridged table built-up section 27 is used to select delay abridged table from multipath to MPU 86 reports.Be similar to first embodiment, MPU 86 carries out multipath and selects, thus the multipath (timing of multipath) that acquisition will be used in the RAKE combination.

As mentioned above, phase stem portion 23 is calculated go that expansion 22 obtains remove spread signal and distribute to the multiplication of complex numbers between each conjugate complex number pattern of antenna A1 and A2 respectively, going pilot blocks in the spread signal to be divided into corresponding to the pilot blocks of antenna A1 partly with corresponding to the pilot blocks part of antenna A2.Postpone abridged table and produce the delay abridged table that part 26 produces the signal that sends from antenna A1 and A2 respectively, utilize the signal that separates to produce described delay abridged table, postpone abridged table built-up section 27 combinatorial delays abridged tables subsequently, obtain to be used to select the delay abridged table of multipath.Subsequently, MPU 86 carries out multipath and selects according to the delay abridged table that is used to select multipath.According to a second embodiment of the present invention, in the DS-CDMA system that adopts transmit diversity, carry out route searching exactly.

In addition, the same with the situation of first embodiment, because cellular telephone 100 comprises that pin-point accuracy ground carries out the route searching part 3 of route searching, therefore receive the quality of the reception processing that has improved cellular telephone 100 based on the route searching result's of pin-point accuracy RAKE.

Among second embodiment, route searching part 3 can be carried out route searching continuously; Wherein in route searching, use partial common pilot blocks or dedicated pilot piece separately,,, be used alternatingly partial common pilot blocks and dedicated pilot piece by closing the pilot blocks that is not used perhaps according to the time.

In addition, be similar to the situation of first embodiment, when each route searching for use partial common pilot blocks, perhaps use the route searching of dedicated pilot piece to provide from going expansion 22 when postponing resource that abridged table produces part, route searching that uses the partial common pilot blocks and the route searching that uses the dedicated pilot piece can walk abreast.

In addition, identical with first embodiment, can utilize whole or the partial common pilot blocks is finished route searching, and be similar to the situation of first embodiment, can utilize whole or part dedicated pilot piece is finished route searching.

In addition, identical with the situation of first embodiment, go expansion 22 can comprise some correlators, rather than matched filter.

In addition, be similar to the situation of first embodiment, DSP 87 can carry out multipath and select.

Industrial applicability

Method for searching path of the present invention and path-searcher can adopt transmit diversity Carry out exactly route searching in the DS-CDMA system. So, route searching side of the present invention Method and path-searcher are applicable to the multipath in the DS-CDMA system that adopts transmit diversity Movement station under the environment.

Portable terminal of the present invention can carry out high-quality reception, because according to path of the present invention The result of the accurate route searching that searcher carries out, portable terminal can be finished the RAKE combination.

Claims

1, a kind of method for searching path, be used for according to comprising corresponding spread signal by reception, and the some signals that send from some transmitting antennas and the received signal that obtains, executive path search, described some transmitting antennas are given the complex number type pilot frequency mode separately, described pilot frequency mode is orthogonal, and described method comprises the steps:

According to the extended code that produces spread signal, go expansion to received signal, thereby obtain to go spread signal;

Go the multiplication of complex numbers of the conjugate complex number pattern of spread signal and each pilot frequency mode by calculating, going spread signal to be divided into some signals, wherein each signal comprises the pilot blocks that corresponds respectively to transmitting antenna;

According to the signal that separates, produce the delay abridged table of the some signals that send from transmitting antenna respectively;

According to the delay abridged table that produces, be combined into the delay abridged table that is used for the multipath selection; With

According to being used for the delay abridged table that multipath is selected, carrying out multipath and select.

2, according to the described method for searching path of claim 1, wherein

Pilot blocks comprises part dedicated pilot piece at least, and described dedicated pilot piece is included in each time slot on the DPCH.

3, according to the described method for searching path of claim 1, wherein

Pilot blocks comprises the partial common pilot blocks at least, and described common pilot piece is included in each time slot on the common common pilot channel of using in each base station.

4, according to the described method for searching path of claim 1, wherein

Pilot blocks comprises to small part dedicated pilot piece and partial common pilot blocks at least, described dedicated pilot piece is included in each time slot on the DPCH, described common pilot piece is included in each base station in each time slot on the common common pilot channel of using, and

Order is utilized the dedicated pilot piece to produce the delay abridged table and is utilized the common pilot piece to produce and postpones abridged table.

5, according to the described method for searching path of claim 1, wherein

Walk abreast and utilize dedicated pilot piece generation delay abridged table and utilize the common pilot piece to produce the delay abridged table.

6,, wherein postpone abridged table generation step and comprise the steps: according to the arbitrary described method for searching path of claim 1-5

Sampled point in being present in some subsequent timeslots, to the amplitude of the in-phase component in each separation signal addition that is concerned with, employing point in being present in some subsequent timeslots, to the amplitude of the quadrature component in each separation signal addition that is concerned with, in pilot blocks, regularly arrange sampled point with symbol period;

Calculate signal power by the result who utilizes relevant addition acquisition;

Utilize the mean value of symbol period signal calculated power;

According to the mean value of signal power, produce delay abridged table shape, and

Multipath selects execution in step to comprise the steps:

Extraction is used for the delay abridged table that multipath is selected, and the mean value of signal power is not less than the sample position of predetermined threshold; With

According to the sample position that extracts, calculating path-phase information.

7, according to the arbitrary described method for searching path of claim 1-5, wherein postponing abridged table generation step can comprise the steps:

Calculating is present in the signal power of each sample position in the pilot blocks in each separation signal, wherein regularly arranges sampled point with symbol period in pilot blocks;

Calculating is present in the mean value of the signal power of the sampled point in some subsequent timeslots; With

Multipath selects execution in step to comprise the steps:

8, a kind of basis comprises corresponding spread signal by reception, and the some signals that send from some transmitting antennas and the received signal that obtains, carry out the path-searcher of route searching, described some transmitting antennas are given the complex number type pilot frequency mode separately, described pilot frequency mode is orthogonal, and described path-searcher comprises:

According to the extended code that produces spread signal, go expansion to received signal, thereby obtain to go the expanding unit that goes of spread signal;

Go the multiplication of complex numbers of the conjugate complex number pattern of spread signal and each pilot frequency mode by calculating, going spread signal to be divided into the separator of some signals, wherein each signal comprises the pilot blocks that corresponds respectively to transmitting antenna;

The signal that utilize to separate produces the delay abridged table generation device of the delay abridged table of the described some signals that send from transmitting antenna respectively;

According to the delay abridged table that produces, be combined into the delay abridged table composite set of the delay abridged table that is used for the multipath selection; With

According to being used for the delay abridged table that multipath is selected, carry out the multipath choice device that multipath is selected.

9,, wherein postpone the abridged table generation device and also comprise according to the described path-searcher of claim 8:

Sampled point in being present in some subsequent timeslots, to the amplitude of the in-phase component in each separation signal addition that is concerned with, employing point in being present in some subsequent timeslots, to the be concerned with relevant adder of addition of the amplitude of the quadrature component in each separation signal, in some pilot blocks, regularly arrange sampled point with symbol period;

Calculate the signal power calculation element of the result's who obtains by the relevant adder of use signal power;

Utilize the average computing device of symbol period signal calculated power average value; With

According to the mean value of signal power, produce the delay abridged table shape generation device that postpones abridged table, and

The multipath choice device also comprises:

Extraction is used for the delay abridged table that multipath is selected, and the mean value of signal power is not less than the draw-out device of the sample position of predetermined threshold; With

According to the sample position that extracts, the path of calculating path-phase information-phase calculation device.

10,, wherein postpone the abridged table generation device and also comprise according to the described path-searcher of claim 8:

Calculating is present in the signal power calculation element of the signal power of the sampled point in the pilot blocks in each separation signal, regularly arranges sampled point with symbol period in pilot blocks;

Calculating is present in the average computing device of the signal power mean value of the sampling location in some subsequent timeslots, regularly arranges the sampling location with symbol period in pilot blocks; With

According to the mean value of signal power, produce the delay abridged table shape generation device that postpones abridged table,

The multipath choice device comprises:

11, a kind of portable terminal comprises:

The receiving system of the signal that reception is sent from the base station; With

Arbitrary described according to claim 8-10, the path-searcher of the signal executive path search that receives according to receiving system.